"My testosterone is normal, so why do I feel like this?"
Here's one of my favorite conversations to have, because this is where a lab number needs a person sitting next to it.
You get a result back. Maybe it says normal. Maybe it says low. Either way, a number by itself doesn't tell you much. So let's talk about what it means.
Quick summary: what you need to know
- Normal covers a wide range. Ranges vary by lab, age, and sex.
- You'll often see 300 ng/dL as the line for men. At AgeWell, no one number decides your care. We look at the whole picture.
- Women's levels are much lower, typically 15 to 46 ng/dL.
- Total testosterone is only part of it. Free testosterone and SHBG add more to the picture.
- Normal isn't the same as good for you. Your symptoms matter as much as your number.
- Numbers change. Time of day, illness, and sleep can all affect a result.
What is a normal testosterone level?
A normal testosterone level depends on your age, your sex, and the lab that ran it. For men, you'll often see 300 ng/dL used as the line, and many clinicians consider a level below 300 low. For women, levels are typically 15 to 46 ng/dL. Those are starting points, and your lab may use a different range.
Levels in men peak around age 18 and decline from the 40s on, though the exact ranges differ from one source to the next. Women's levels are highest around age 20 and fall with age too.
I'm not giving you a target here, and I'd be careful with anyone who does. There isn't one right number for everyone.
Is a testosterone level of 300 low?
A level of 300 ng/dL sits right at the line many clinicians use for low testosterone in men, which is why so many men search for it. It tells you where your number falls compared with a lot of other men. It doesn't tell you how you feel, how much of that testosterone your body can use, or where your level used to be.
I like to think of it like a golf bag. Your labs tell you what's in the bag. They don't tell you how well those clubs fit you or what the wind is doing that day.
At AgeWell, there's no one number we base our decisions on, and that includes 300. We look at the whole picture. A man just above 300 who crashes every afternoon, has lost his drive, and is getting softer through the middle deserves a real conversation. A man just below 300 who feels great may not need treatment at all. Two people can have the same level and feel completely different.
Why can my testosterone be normal if I have symptoms?
Your testosterone can be normal and you can still have symptoms because normal only means your number is common. A lab range covers a very wide group of people. A 50-year-old man at the bottom of the range and a 50-year-old man at the top of the range both get told they're normal, and they may feel very different.
Your own history matters too. If your level has always run high and now it's much lower, that may feel like a big change, even if the number is inside the range. Of course, your symptoms may have another cause altogether, so we look at those too.
Normal for the population isn't the same as good for you.
What's the difference between total and free testosterone?
Total testosterone is all the testosterone in your blood. Free testosterone is the small part that isn't bound to a protein and is easily available to your body.
Think of SHBG, or sex hormone-binding globulin, like a parking lot. Testosterone bound to SHBG is parked. Free testosterone is out on the road. Two people can have the same total number and very different amounts on the road. That's why I don't like to look at total testosterone alone.
What can change a testosterone result?
Several things can change a testosterone result:
- Time of day. Testosterone is usually highest in the morning.
- Illness. Being sick can lower it for a while.
- Sleep and stress. Both can affect how your hormones behave.
- Weight and insulin. Metabolic health and testosterone are closely tied.
- Hormone treatment. The timing of your last dose matters if you're on testosterone.
That's why one number can be misleading. I want to know when it was drawn and what else was happening.
Should women have their testosterone checked?
Women make testosterone too, and it plays a part in desire, energy, and how you feel. Many labs use tests designed for men's higher levels, so results at women's lower levels can be harder to interpret. That's another reason to look at the whole picture with someone who does this every day.
What level do you need for testosterone therapy?
There's no single number that decides this at AgeWell. We look at your symptoms, medical history, goals, risks, labs, what you've tried before, and any older labs we can compare. Then we talk through what we hope treatment will do.
Some people with a number that's in range may benefit, and some people with a lower number may have something else to work on first. We use medicine off-label when it fits, as doctors do all the time, and we'll explain what that means for you.
If you want help understanding your numbers, read about low testosterone symptoms in men, testosterone therapy, or start with a Foundational Assessment.
Frequently asked questions
Is 300 a good testosterone level?
It's right at the line many clinicians use for low testosterone in men. Whether it's a good level for you depends on your symptoms, your free testosterone, your history, and your goals.
What's a good testosterone level for a 50-year-old man?
There's no single number that fits every man. Ranges vary by lab, and how you feel matters too.
What's a normal testosterone level for a woman?
Women's levels are typically 15 to 46 ng/dL, and ranges vary by lab.
Do testosterone levels go down with age?
Yes, in men and in women. The change is usually gradual.
See if AgeWell is right for you
This article is for education and isn't a substitute for personalized medical advice. Talk with your clinician about your own situation. If you have severe or urgent symptoms, seek emergency care.
Sources
- Cleveland Clinic: Testosterone
- Cleveland Clinic: Low Testosterone
- Doles N, et al. Interpretating Normal Values and Reference Ranges for Laboratory Tests. Journal of the American Board of Family Medicine. 2025.
